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1<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-ipv6">
2 <title>IPv6 Configuration</title>
3 <para>
4 IPv6 is enabled by default. Stateless address autoconfiguration is
5 used to automatically assign IPv6 addresses to all interfaces, and
6 Privacy Extensions (RFC 4946) are enabled by default. You can adjust
7 the default for this by setting
8 <xref linkend="opt-networking.tempAddresses" />. This option may be
9 overridden on a per-interface basis by
10 <xref linkend="opt-networking.interfaces._name_.tempAddress" />. You
11 can disable IPv6 support globally by setting:
12 </para>
13 <programlisting language="bash">
14networking.enableIPv6 = false;
15</programlisting>
16 <para>
17 You can disable IPv6 on a single interface using a normal sysctl (in
18 this example, we use interface <literal>eth0</literal>):
19 </para>
20 <programlisting language="bash">
21boot.kernel.sysctl."net.ipv6.conf.eth0.disable_ipv6" = true;
22</programlisting>
23 <para>
24 As with IPv4 networking interfaces are automatically configured via
25 DHCPv6. You can configure an interface manually:
26 </para>
27 <programlisting language="bash">
28networking.interfaces.eth0.ipv6.addresses = [ {
29 address = "fe00:aa:bb:cc::2";
30 prefixLength = 64;
31} ];
32</programlisting>
33 <para>
34 For configuring a gateway, optionally with explicitly specified
35 interface:
36 </para>
37 <programlisting language="bash">
38networking.defaultGateway6 = {
39 address = "fe00::1";
40 interface = "enp0s3";
41};
42</programlisting>
43 <para>
44 See <xref linkend="sec-ipv4" /> for similar examples and additional
45 information.
46 </para>
47</section>